Molding press to make molded blocks



, -c. METZ ET AL momma mass TO MAKE mommn BLOCKS Filed April 13, 1923 a Shee's-rSheet 2 Ill Nov. 2 1926.

c. METZ ET AL MOLDING PRESS TO MAKE MOLDED BLOCKS Filed April '13 1923 3 Sheets-Sheet 5 Patented Nuv.'2, 192e.- v 4 1,605,600 UNITED STATES PATENT OFFICE.

mamas narz arm enemas scnonmonan, or as. mam, rmcn.

IOLDIHG PRESS '10 nu KOLI'JED BLOCKS. Application fled April 18, 1928, Serial 110.: 681,829, and in Germany December 6, 1988.

' This invention relates to improvements in mold part 5, these lugs bein guided between molding presses, the ob'ect being to provide pairs of vertical guides 7, I and in conneca molding press to ma e molded blocks in t1on with which vertical guiding rods 5" which the molding and pressing of the blocks disposed symmetrically to the ,longitudinal I is done by filling the material into a mold axis of the machine, assure a quite regular composed of two arts one of which is movraising and lowering of the mold partand able and in which the pressing is obtained also facilitate greatly the interchangeability through a repeated ramming with a handof different molds. The mold part 5 1S closed ramming device, and the discharging of the atthe bottom by a horizontal base plate 8 Cl 10 finished mold blocks out 'of the mold by which'is hingedly connected to-a lug 9. 11 raising the movable part out of the mold is a' pin rigidly secured to the lug 9 from block and guiding it against the ramming which the base plate 8 is resiliently susdevice locked at a convenient height. pended by a spiral spring 13. A pin 12 Compared with similar machines for the arranged transversely to the pin 11 and To ll same purpose, our improved press has the iormed integral therewith normally rests following improvements: 1n a recess provided in the lug 9 and ina 1. Its manipulation is much simplified. corresponding recess provided in a lug 10 2. The possibility of application is greater. cast integral with the base plate 8. When 3. Its efiiciency 1s very much increased. turning the base plate 8 the upper surface of 75 8 To obtain these results quite a few novel- .the lug 10 hearing against the lug 9 cams ties and improvements of construction were over the pin 12 and thus efiects a sudden necessary, comprising the machine as a whole separation of the base plate 8 from the mold and concerning also single parts of it, the part 5. The base plate is also provided use, working and improvements of which with a hook 14 for engagement in an-eye ll are described and shown in the following 15 provided on the mold part 5 the base description and drawings. plate being also provided with a handle 16.

The drawings show in-- The raising of the mold part 5 is effected by Fig. 1 a front view of the machine. means of levers 17, 17 provided with pro- Fig. 2 a cross section. jections v 18, 18 engaging with the guide v Fig. 3 a partial section of the work table lugs 6, 6, against which they are pressed of the machine on an enlarged scale, by springs 17. The lower ends of these Fig. 4 a plan view of the portion shown levers are hingedly connected at their lower in Fig. 3. 9 ends to pedal mechanism rotatably mounted Fig. 5 a section through the ramming dein the supports 19 and-consisting of. a pivot- 90 I vice and its roller-guides. T ally mounted rod 20, connecting rod 21 shaft Fig. 6a section viewed at an angle of 90, 22, pedal 23 and auxiliary pedal -In to Fig. 5. order to raise the mold part 5 periodically. Fig. 7' shows enlarged views at right anreleasing levers 26 are provided which l'eve'rs gles to each other. of one of the springs and are rotatably mounted on shafts 27 between 96 O associated parts for operating the mold the vertical guides 7, 7' and are rovided plunger, with rojections 25. Below the s afts 27 v -F-ig. 8 shows enlar ed views at right anthese evers are bent slightly inwardly and gles to each other 0 the upper portion of are curved at their u per ends 28. To each one of the releasing levers. upper end is pivote a fork 29 of which 1 C 9 is an enlar ed view at right angles the stem 30 slides through rotatably mounted to F1 1 showing t e mold art 5 removed uide plates 31. Springs 32 act upon the and t e pivot mechanism 0 the base plate orks 29 in such a manner that they may in section. V be retained both in the full line and dotted In the drawings 1 is a work-table,'2 are linepositions shown in Figure 1. The 1 I the supports, 3 an opening in the table '1 stampingmechanisin of the machine prefer-- for the reception of the cores of the molding abl consists of plungers 33, guided between box, 4' are slots between the separate cores r01 ers 34, the upper surface ofwhich is and 4" such slots in the'work-table which double bevelled according to-the inclination enable the material which is being pressed of the guide cross beams and also has open- I. to fall therethrough when raising the mold ings for the escaping of the enclosed air part. 5. '6, 6 are the guiding lugs on -the in the hollow parts of the plunger, operating rods 35, a transverse beam 36, connecting links 37, bell crank levers 38 and spiral springs 39. An essential feature of the invention consists in the arrangement of the spiral springs 39, which at their upper ends bear against a disc 40 which is secured by a central rod 41 to lugs 42, and at their lower ends against .a disc 43, the said disc 43 being connected by rods 44, preferably passing along the inside of the spiral springs 39, to the short arm of the lever 38. By this means the springs 39 are retained in a vertical position and consequently operatewithout obstruction. The machine is completed by a setting device 45 for the plungers 33, the device 45 being adjustable iii-the longitudinal direction. This setting device consists essentially of a piece of pipe one end of which is connected in a spring controlled wa to a holder 46 of T iron and the other on has an adjustable screw 47.

In the upraised position the device is pressed by means. of a spiral spring against the side wall of the holder 46 whereas dur ing the locking of the plunger 33 in the downward position, the setting device bears vertically against the bevelled upper surface ofthe plunger. In the first case the working at the table is therefore not hindered and in the second case an absolutely. rigid setting of the plunger is obtained.

Between the two cross'; bea1ns of the frame a spring worked buffer 49 -is disposed,

avoided.

' lugs with the second against which knocks a posed on the plunger raised, hence all felt bolster 50 diswhen the same is noise during the working. is

The method of operation of the machine, for which two men are required, is substantially the same both as regards the-filling 0f the machine and the stamping operation as in ordinary known machines of this character. The discharge of the finished molded products is also effected in the known manner b moving the mold portion 5 towards the p ungers 35which have been previously locked in position by means of the device 45. The only difi'erence consists in the movement of the mold 5 which is elfected in a more efficient manner than hitherto by first bringing the guide lugs 6, 6' of the mold part 5 into engagement with the lowermost projections 25 of the releasing levers 26 by means of the levers 17, 17', whereupon a plate 'is placed under .themold part 5 on the cores 4 for the reception of the molded products. By turning thehandle 16 the base plate 8 will now be turned rearwardly molded products by the further raising of the mold part 5 and the en agement of its the releasing levers 26 are pressed out of the moldin the known manner. Any waste products the means for operating for raising the mold part and for controlpair 0 projections on material from the various operations will now fall through theslots between the cores and in the work tableand hence a collection of this material on the work-table will be avoided. After removal of the molded machine is reset for a fresh operation. For this purpose the plunger device 33 is first released, the base plate 8 is closed and the mold part 5 is raised by means of the pedal'lever 23 sothat the guide lugs 6 engage with the curved ends 28 of the releasing. levers 26 thus pressing these laterally outwards. As tion of the guiding forks 29 has been passed, the releasingilevers 26 are moved rigidly into the dotted position shown in Fi by the action of the spring 32. The mold part 5 will now be lowered on the projections 18 and 18' of the levers 17 and 17' and after the disengagement of these levers falls back on the table. Its guide lugs 6 now pass over the inwardly inclined ends of the releasing levers 26 and thus return these to their original position. The opera tion above described is now repeated.

Having thus described our invention what we claim as new and desire to secure by Letters Patent is 1. A machine for comprising a frame-work, a table supported by said frame-work, mold cores carried by said table, said cores and the work-table having slots formed around them, a cooperating mold part having a bottom pivoted thereto for horizontal movement between the said cores andcooperating mold part, plungers' for compressing the material in the molds,

the plungers and means ling its downward movement.

2. A machine for molding plastic-material comprising a frame-work, a table supported by said frame-work, mold cores car-- said cores and the work formed around them, a part, said mold part havried by said table, table having slots co-operating mold 1ng downwardly converging inner walls, a

base plate for said mold part and on pin passing through said lugs, said lugs having 'correspondlng recesses in their adacent surfaces, a cross pin secured to the mold part, lugs on the vertical pin and normally engaging said soon as the vertical posigurel the -base plate, a vertical recesses, a. spring engaging with said ver- ,tical; pin and normally tending to hold the base plate in its closed position.

3. A machine for molding plastic material ers for compressing the comprising a frame-work, a table sup rted I away from the mold part 5 on the pin 11 in b frame between which the guide lugs move, releasing lever for cooperating with said guide lugs, and pedal mechanism for raising and lowering said mold part.

4. A machine for molding plastic material comprising a frame-work, a table supported by said frame-work, mold cores carried by said table, said cores and the worktable having slots formed around them, a co-operating mold part, plungers for compressing the material in the molds, means for operating the plungers, guide lugs projecting from said mold part, vertical standards in said frame between which the guide lugs move, pedal mechanism for raising and lowering said mold part, releasing vers pivotally mounted between said standards, projections on said releasing levers having inwardly turned lower ends and inwardly curved upper ends, spring actuated forks engaging with the upper ends of the releasing levers, said spring actuated forks being so arranged that when the releasing levers are pressed beyond the vertical osition of the spring actuated forks sai releasing levers will be moved outwardly by said spring actuated forks, the inwardly bent lower ends and the inwardly curved upper ends of said releasing levers being adapted to co-operate with the guide lugs of the mold part, the said guide lugs when engaging with the inwardly curved upper ends of said levers serving to move said levers outwardly so that the projections on said levers will be moved out of the path of said guide lugs during the downward movement of the mold part, whilst when the guide lugs engage with the inwardly bent lower ends of the releasing levers the releasing levers will be returned to their normal positions.

5. A machine for molding plastic material comprising a frame-work, a table supported by said frame-work, mold cores carried by said table, said cores and the worktable having slots formed around them, a co-operating mold'part, plungers for comres sing the material in the molds, means machine and which can be longitudinally adjusted for the locking of the plungers during the discharging of the blocks out of the mold, a spiral spring being lodged in said tube in such a way that same bears against the side wall of the tube holder when the tube is in the upraised position and maintains it in-a position not ,hindering the working. 1'

6. A machine for moldin plastic material comprising a frame-wor a table supported by said frame-work, mold cores carried by said table, plun ers for compressing the material in the mo ds, means for operating the plungers and means for raising the mold part and for controlling its downward movement, and means for absorbing the recoil movement of the plungers, said means comprising a lug connected to'the frame-work, a vertical rod connected at its lower end to said lug, a disc at the up er end of said vertical rod, a second disc slii ably mounted onsaid vertical rod, a air of rods connecting said disc to the p un er mechanism, and a coil spring arranged a tween said discs, the pair of rods connected to the lower disc preferably passing inside the coils of said spiral spring.

7. A machine for molding plastic material, comprising a frame worx, a table supported thereby and having mold cores car,- ried thereon, plungers for compre'ssin material in the molds, a cooperating mold part between the cores and'the plungers, means for guiding the cooperatin part, and releasing levers cooperating with said guiding means. 1

CHARLES METZ. GEORGES SCHOENBACHER. 

